What is the role of Canadas governor general?

they are the representative of the Canadian sovereign, carries out the parliamentary duties of the sovereign in their absence, such as summoning parliament, reading the speech from the throne, and proroguing and dissolving parliament

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know

c. archbishop desmond tutu promoted the acknowledgement of the rights of black africans and expose human rights abuses.

d. leader haile selassie modernized african society through the institution of progressive social, economic, and educational reforms.